Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Preparation for Commercial / ATP Pilots Your instructor for this Ground School… Brand Wessels Cell: 073-591 3907 Email: [email protected] Agenda: • Personal Introductions – name, background, qualifications • What is our expectations from this course • Course Rules – be on time, be prepared and participate constructively • Be Professional • Course Schedule • Have FUN! Mathematics What do we need to know? We need to have basic understanding of: • Basic Algebra - cross-multiplication, crossaddition and -subtraction, averaging, powers and roots, bracketing, percentages, inverse calculation and vectors. • Basic Trigonometry – Triangles, Ratio’s, Pythagoras. • Basic Interpolation. • How to operate the Navigation Computer and Scientific Calculator. The Myth – “this is difficult…” • If you passed Mathematics up to Grade 10 standard grade, you have covered everything you will need. • There is NOTHING in the CAA theory syllabus, that is as difficult as passing a current Grade 12 Higher Grade Mathematics' exam – go try one…. SA Grade 12 formulas in 2008…… That Being Said…. • • • • You have to know the basics WELL. You have to know your calculators WELL. You have to stay CURRENT. You have to show enough RESPECT for the basics required. • The CPL/ATPL exam is quite a lot of work – about the same volume as the first 3 month’s of Engineering studies at University. If you are not on top of the required mathematics, you will waste time. The ABC of this course…. •APPLY your •BACKSIDE to the •CHAIR…. Trig Example: You are taking off from a runway, with a hill 300’ high, 6000’ from the threshold. What angle of climb must you maintain to clear the hill? tan c = b/a Push this button just you choose a 2nd And y=300’ before and x=6000’ function button Tan x = 0.05 Inverse Force of 3(or cot, or Divide byButton tan same as inverse tanˉ¹) Force of 2 Thus c = 2,86º 10 to the force … Square Root Brackets Degree, minutes, seconds – also hours, minutes, seconds % Button Functions A fraction is an ordered pair of whole numbers, the 1st one is usually written on top of the other, such as ½ or ¾ . a b numerator denominator The denominator tells us how many pieces the whole is divided into, thus this number cannot be 0. The numerator tells us how many such pieces are being considered. • Variable – A variable is a letter or symbol that represents a number (unknown quantity). • 8 + n = 12 • A variable can use any letter of the alphabet. •n+5 •x–7 • w - 25 An Equation is like a balance scale. Everything must be equal on both sides. = 10 5+5 When an amount is unknown on one side of the equation it is an open equation. = 7 n+2 When you find a number for n you change the open equation to a true equation. You solve the equation. = 7 5n + 2 Simple Algebra • Remember Rules: • The sum of two positive numbers is always positive. • The sum of two negative numbers is always negative. • Multiplication/Division of two positive numbers is always positive. • Multiplication/Division of two negative numbers is always positive. • Multiplication/Division of a positive and a negative number is always negative. Addition and Subtraction 26+(-38)-(-55)+(-61)-(23) = -41 On the calculator – type it all without the brackets…. Powers and Roots 2 x 2, same as 2², same as 2 to the power of 2, same as 4. The root of 4, same as √4, same as 2. On the calculator: 2x², enter = 4 √4, enter = 2 Inverse operation the opposite operation used to undo the first. •4+3=7 7–4=3 • 6 x 6 = 36 36 / 6 = 6 • Use “xˉ¹” on you calculator. Parentheses and Brackets) Use brackets when you want to do certain calculation before the rest: b² = 60² - (35000÷6080)² b² = 3566,8. Now press √ and b = 59,72 C = 2 x ((9÷3) + (4+3)²) C = 2 x (3 + 49) C = 104 Order of Algebraic Operation: “PEMDAS” Solve in the following sequence: • P for solving Parentheses(or brackets) • E for solving Exponents next • MD for Multiplication and Division next • AS for Adding and Subtracting next. Example: • y = ((4³ + √((3+27) – (25÷5))) ÷ 3) + 273 • P is y = ((4³ + √(30 – 5)) ÷ 3) +273 And y = ((4³ + √25) ÷ 3) +273 • E is y = ((64 + 5) ÷ 3) +273 • MD is y = (69 ÷ 3) + 273 • AS is y = 23 + 273 = 296 Prove it by typing the whole equation into your calculator at once…. Solving Addition and Subtraction Equations Procedure • Isolate the variable by performing the inverse operation on that variable. • The inverse of subtraction is adding. The inverse of adding is subtracting. • Perform the same operation on the side of the equal sign that does not have a variable. Example y + 13 = 25 - 13 - 13 y = 12 We want to get the y by itself. Perform the inverse operation. The inverse of adding is subtracting. Do the same operation on the other side of the equal sign. Check the answer in the original equation. y + 13 = 25 12 + 13 = 25 25 = 25 Example 2 k – 12 = 4 + 12 + 12 k = 16 To get k by itself, we perform the inverse operation. The opposite of “minus 12” is “plus 12.” Check k – 12 = 4 16 – 12 = 4 4 = 4 Solving Multiplication and Division Equations Procedure • Isolate the variable by performing the inverse operation on the number that is attached to the variable. • The inverse of multiplication is division. The inverse of division is multiplication. • Use the “Golden Rule.” Perform the same operation on the other side of the equal sign. Example The inverse of division is multiplication. Repeat the operation on the other side. m ÷ 3 = 10 x3 x3 m = 30 Check. Use the original equation. m ÷ 3 = 10 30 ÷ 3 = 10 10 = 10 Example 2 The inverse of multiplying is dividing. 7b = 105 ÷ 7 ÷ 7 15 7 105 b = 15 7 35 35 0 Check 7b = 105 7(15) = 105 105 = 105 Cross Multiplication Moving the variable around in a function, until the unknown variable is isolated. Example: In a² = b² + c², if we have to c solve for we have to isolate it on one side of the equal sign. Important: What you do on one side of the equation has to be done on the other side. a² = b² + c² - b² leaves c² isolated, but then we have to subtract b² on the left side of the Thus: equation as well: a² - b² = c² And solving for B in the following function: xb bx Something divided by itself = 1 SIN B = • Remember “of” means multiply in mathematics. •“Per” means division in mathematics. Solve the Problems 3a = 21 To solve a, divide both sides by 3: a=7 b + 17 = 59 To solve a, subtract 17 from both sides: b = 42 c – 22 = 100 To solve c, add 22 to both sides d = 50 5 To solve for d, multiply both sides by 5 d = 250 Exponents Vocabulary exponent – the number of times a number is multiplied by itself. base – the number that is being multiplied. 3 base 8 This is read “8 to the 3rd power” or “8 cubed.” It means 8 x 8 x 8. exponent Evaluating Exponents 5 2 = 2 x 2 x 2 x 2 x 2 = 32 3 6 = 6 x 6 x 6 = 216 4 1.3 = 1.3 x 1.3 x 1.3 x 1.3 = 2.8561 Exponents with a base of 10 • Any multiple of ten can be expressed as an exponent with a base of ten. • The base is 10. The number of zeroes gives us the exponent. 2 • Example: 100 = 10 4 • 10,000 = 10 1,000,000 = 10 6 Writing in Expanded Form Using Powers of 10 • First, write the problem in expanded form. • Then, change each term to a multiplication of the value and its place. • Change the place values to exponents with powers of 10. Example 7, 946 7, 000 + 900 + 40 + 6 (7 x 1,000) + (9 x 100) + (4 x 10) + (6 x 1) 3 2 1 7 x 10 + 9 x 10 + 4 x 10 + 6 Percentages Simply a fraction of 100 (meaning “cent) Examples: •1/3 = 33.33% (1÷3x100) •¾ = 75% (3÷4x100) •1½ = 150% (3÷2x100) •15% of 3267 = 490 •230 expressed as a % of 430 = On the calculator – 230÷430x100 = 53,5% use “shift, %” to do it faster. Percents Have Equivalents in Decimals and Fractions Percent Fraction Decimal Fraction Simplified 1 20 20% = .20 = 100 = 5 Finding a Percent of a Number Using a Proportion • Set up a proportion that uses the percent over 100. • Cross multiply to write an equation. • Solve the equation. To set up your proportion, think, “IS over OF equals PERCENT over 100.” Example – What is 20% of 30? x = 30 100x = 100x = 100 x = 20 100 30(20) 600 100 6 part whole Using a Decimal • Change the percent to a decimal. • Multiply that decimal by the number you are finding the percent of. Example – What is 18% of 70? 18% = 0.18 0.18 x 70 = 12.6 Vocabulary • A percent is a ratio that compares a number to 100. It means “per 100.” • 49 out of 100 is 49%. Writing Percents as Decimals • Imagine a decimal point in the place of the percent sign, and move the decimal two spaces to the left (the same as dividing by 100). 26% 40% 7% .26 .40 .07 .4 Writing Percents as Fractions • Place the percent in a fraction with a denominator of 100. • Simplify the fraction. 26% 26 100 13 50 75% 75 100 3 4 Writing Decimals as Percents • Move the decimal point two spaces to the right, and add a % symbol (this is the same as multiplying by 100). .34 .19 .125 .6 34% 1 19% 12.5% 60% 100% Included % When asked to work out the % of reserve fuel when it’s already included in the total given, care must be taken with the mathematics: Example: We have 11 500 Lt of fuel which include 15% reserve – how much fuel do we have available without using the reserve fuel? If we started with 10 000 Lt and then had to add 15% reserve it means: 10 000 x 15% = 1500 + 10 000 = 11 500 Lt total fuel. To reverse the calculation (how much fuel do we have without the 15%), we have to divide the total with 1.15 (or 115%). Or 11 500 ÷ 1.15 = 10 000 Lt Averages Simply add all the quantities and divide it by the number of quantities Example: 7, 11, 14, 8, 3, 26 means (7 + 11 + 14 + 8 + 3 + 26) ÷ 6 = 11.5 Hint • If you don’t see a negative or positive sign in front of a number it is positive. +9 Rounding of Decimal Numbers • When the digit to the right of the last retained digit is 5 or greater, round up by 1 • When the digit to the right of the last retained digit is less than 5, keep the last retained digit unchanged Example: 23.46 becomes 23.5 Note: Only do rounding at the final calculation….. And 2.1938 becomes 2.2 Ratios • A comparison of two numbers • Can be expressed as: – a fraction – A colon (:) – The word “to” Example: A gear ratio of 5:8 can be express as: ⅝ or 5:8 or 5 to 8 Ratios in Aviation • • • • • • • • • Compression Ratio Mach Number Aspect Ratio Air-Fuel Ratio Glide Ratio Gear Ratio Interpolation Trigonometry Map Scales No Unit of Measure…. i.e.: cm, lt or nm, etc. Ratios • A ratio is a comparison between two numbers by division. • It can be written in three different ways: 5 to 2 5:2 5 2 Equal Ratios • When two ratios name the same number, they are equal. It’s like writing an equivalent fraction. 20 : 30 Equal Ratios: 10 : 15 2 : 3 80 : 120 Example: If the cruising speed of an airline is 200knots and its maximum speed is 250knots, what is the ratio of cruising speed to the maximum speed? • Solution: • First express the speeds as a fraction: – Or Ratio = 200 250 • Then reduce fraction to smallest terms: – Or Ratio = 200 250 = 4 5 or 4 to 5, or 4:5 Angles Vocabulary • An angle has two sides and a vertex. • The sides of the angles are rays. The rays share a common endpoint (the vertex) • Angles are measured in units called degrees. Types of Angles When lines intersect to form right angles, then they are classified as perpendicular lines. Measuring Angles • Place the center point of the protractor on the vertex of the angle and turn the protractor so that one side lines up with 0 on the inner scale. Measuring Angles (strategy 2) • Place the center point of the protractor on the vertex of the angle. Note where both rays cross the protractor. Subtract the two numbers (from the same scale) Property of triangles • The sum of all the angles equals 180º degrees. 60º 90º 30º What is the missing angle? 40º ? 70º 70º 70º 70º + ? 180º Classifying Triangles Classifying by Angle •Acute triangles have three acute angles. •Obtuse triangles have one obtuse angle. •Right triangles have one right angle. Classifying by Sides •Equilateral triangles have three congruent sides. •Isosceles triangles have two congruent sides. •Scalene triangles have zero congruent sides. Finding Missing Angles •The three angles of a triangle always add to 180°. •Use a variable to stand for the missing angle and set an equation equal to 180. x + 49 + 47 = 180 x + 96 = 180 – 96 = -96 x = 84 Trigonometry The Right Angled Triangle Trigonometric functions are commonly defined as ratios of two sides of a right triangle containing the angle Study Tip Acronym's to use: • Sin-oh • Cos-ah • Tan-oa Example: There is a hill 250’ high, 3000’ from the threshold of the runway. What must the angle of climb be to clear the hill by 100’? Answer: Tan ∞ = 350 Can you see it’s a Right Angled Triangle? •Sin-oh •Cos-ah •Tan-oa 3000 Tan ∞ = 0.116 Thus we use ∞ Tan… tan Which ratio to use? 350’ Hill AoC = 6.65º Opposite ∞ Threshold = 0.116 Adjacent 3000’ 90º The SINE Rule. A Non-Right Angle Triangle c b B a C = = SIN A c b a SIN B SIN C The COSINE Rule. a² = b² + c² - 2bc x COS A b² = a² + c² - 2ac x COS B A c² = a² + b² - 2ab x COS C c b B a C COSINE RULE is used in NON-RIGHT ANGLED TRIANGLES when given the length of two sides and one angle and the unknown is the length of the side opposite the known angle or when given the length of all three sides and the unknown is any angle. Example: Solve the length of Side a. a² = b² + c² - 2bc COS A a² = 3² + 7² - (2 3 7 COS 40) a² = 9 + 49 - 32,17 a² = 25,83 a = √25,83 a = 5,08 UNITS SINE RULE is used in NON-RIGHT ANGLED TRIANGLES when given the length of two sides and one angle and the unknown is the length of the side adjacent to the known angle. Example: At 1205, aircraft A and B are 75 nm's apart and are on a collision course. Aircraft A 330 Kts. Aircraft B 360 Kts. The relative bearing from A to B is 075. What angle needs to be closed by aircraft B to intercept aircraft A? SIN B = SIN B = SIN B = B = ? 0.885 62.3º Graphs of the Trig Functions • Sine – The most fundamental sine wave has the graph shown. – It fluctuates from 0 to a high of 1, down to –1, and back to 0, in a space of 2. Graphs of the Trig Functions • Cosine – The graph of cosine resembles the graph of sine but is shifted to the left. – It fluctuates from 1 to 0, down to –1, back to 0 and up to 1. THE CIRCLE Various questions may be asked relating to the radius, diameter, surface or circumference of a circle. FORMULA c d (diameter) = 2r c (circumference) = 2r r s (surface) = r² s EXAMPLE 1: If the radius of a circle is 7 units, determine its circumference? c = 2r = 2 3,14 7 = 43,98 UNITS Example: To Calculate the Radius of a Turn TAS 240 Kts RATE 1 TURN RATE 1 TURN = 2 mins. (360º) What is the radius of the turn in feet? 2 Circ=240 x 6080' x 60 Circ=48640’ Circ = 2 r r = Circ/ 2 r =48640/ 2 r =7741' Example: What is the value of Convergency between Point A(26º40’S 24º15’E) and Point B (26º40’S 55º15’E)? Convergency = Dlong x sin Mid Lat Solution: The difference in longitude is: 55º15’ - 24º15’ = 31º And: Convergency = Dlong x sin Mid Lat Convergency = 31º x sin 26º40’ Convergency = 31º x 0,449 Convergency = 13,91º Pythagoras • Used with Right Angle Triangles • Used for DME Slant Range Calculation B a² = b² + c² a c 90º C A b Example: An aircraft at 35 000' is 60 DME from a ground station. What is the ground range? Solution: a² = b² + c² or b² = a² - c² b² = 60² - (36000÷6080)² B b² = 3564.9 b = √ 3566,8 35000 a c 90º A ? b 60 b = 59,72 nm (Ground Dist.) C Vectors - Lines with Direction and speed Triangle of Velocities Ground Position Drift Angle Depart Destination THDG/TAS Air Vector/Air Plot Air Position Interpolation: 1. to insert between or among others 2. to change by putting in new material 3. to estimate a missing value by taking an average of known values at neighboring points Interpolate one series at a time: PALT 14 000 AUW 12 000 LBS 1237 AUW 10 750 LBS AUW 10 000 LBS 15 500 16 000 1260 1169 1098 1115 1268 1268 – 1237 = 31/2000 X 1500 = 23,25 (+1237) 1260=– 1260 1115 = 124/2000 X 750 = 54,37 (+1115) = 1169 1120 1120 – 1098 = 22/2000 X 1500 = 16,5 (+1098) = 1114.5 Exercises: 1. Subtract the following numbers: 5920 2. Express as a %: 13/44 3. If full tanks of fuel = 90 000 kg of fuel, and 15% reserves are carried, what is the fuel without reserves? = 29.54% -2744 -4889 3921 90 000 ÷ 1.15 26/85 = 30.58% -492 = 10 124 5. Sin A = .0876. What is value of A? A = 5.02º = 78269.86 kg 1/33 4. Logging the following hours per week, what is the average trip length (hour and minutes)? = 3.03% 3.73 4.5 1.9 2.5 5.7 3h39min57sec Primary Radar Ranging A radar system has the following specifications : PRF of 400 PPS and a pulse width of 2µ seconds. Find the maximum and minimum range. Minimum Range : Range (M) = Speed X Time 2 Range (M) = 3 x 8 10 Meters / second X 2 600 Meters Range (M) = Range (M) = 300 Meters 2 Or 0.3 KM 6 2 X 10 Seconds If the Local Speed of Sound is 1100 feet per second, what is the TAS of an aircraft flying at Mach 0.73? We can not work in feet per second as TAS is in knots. To convert feet per second proceed as follows : 1100 x 60 = 66000 feet / minute: 66000 x 60 = 3960000 feet / hour: 3960000 / 6080 = 651 Kts TAS MachNumber LSS 0.73 TAS 651.32 0.73 651.32 475.5 Knots Two aircraft flying at the same Flight Level, Aircraft A has a Mach Number of 0.815 and a TAS of 500 Knots, Aircraft B has a Mach Number of 0.76. At what Flight Level are the aircraft flying and what is the TAS of aircraft B? MachNumber TAS LSS LSS 613.5 Knots LSS 38.945 coat 273 613.5 38.945 coat 273 613.5 38.945 coat 273 15.75 coat 273 15.75 2 coat 273 248.06 coat 273 248.06 273 coat coat 24.9 Problem Solving Problem Solving is easy if you follow these steps Understand the problem • • • • Step 1 – Understand the problem Read the problem carefully. Find the important information. Write down the numbers. Identify what the problem wants you to solve. • Ask if your answer is going to be a larger or smaller number compared to what you already know. Step 2 - Decide how you’re going to solve the problem Choose a method Use a graph Write an equation Find a pattern Use reasoning Make a table Use formulas Make a list Work backwards Draw a picture Act it out Step 3 - Solve the problem Example: TAS MachNumber LSS Step 4 - Look Back & Check Reread the problem Substitute your new number Did your new number work? Strategy • When a problem contains difficult numbers (like fractions or mixed numbers), then imagine the problem with simpler numbers. • Solve a problem using the simpler numbers. • Check to see if the strategy worked. Does the answer make sense? • Go back and use the same strategy, only this time you can use the more difficult numbers. If you get stuck… • Remember, there are only four operations to choose from: multiply, divide, add, or subtract. • Try a few operations and see which answer makes the most sense. Words that mean “Add” • • • • • • • In all Increased by How many / how much Sum Total Added to Altogether Words that mean “Subtract” • • • • • • • How many / how much MORE Decreased by Difference Less than Fewer than Left / left over Reduced by Words that mean “Multiply” • • • • • Of Product Times Multiplied by In all / total / altogether (when referring to repeated addition) Words that mean “Divide” • • • • • Quotient Out of Per Ratio Percent Navigation Computer Study Methods How to Mind Map 1. Use just key words, or wherever possible images. 2. Start from the center of the page and work out. 3. Make the center a clear and strong visual image that depicts the general theme of the map. 4. Create sub-centers for sub-themes. 5. Put key words on lines. This reinforces structure of notes. 6. Print rather than write in script. It makes them more readable and memorable. Lower case is more visually distinctive (and better remembered) than upper case. 7. Use color to depict themes, associations and to make things stand out. 8. Anything that stands out on the page will stand out in your mind. 9. Think three-dimensionally. 10. Use arrows, icons or other visual aids to show links between different elements. 11. Don't get stuck in one area. If you dry up in one area go to another branch. 12. Put ideas down as they occur, wherever they fit. Don't judge or hold back. 13. Break boundaries. If you run out of space, don't start a new sheet; paste more paper onto the map. (Break the 8x11 mentality.) 14. Be creative. Creativity aids memory. 15. Get involved. Have fun. Your mind think in Pictures!!! Memorize the following shopping list in 10 seconds…. Eggs Bacon Knife Bananas Dough Nuts Pencils Spaghetti Yoghurt Syrup Red Paint Body List Method 1 = Toes 2 = Knees 3 = Thighs 4 = Back side 5 = Love Handles 6 = Shoulders 7 = Throat 8 = Face 9 = Point 1. Eggs 2. Bacon 3. Knife 4. Bananas 5. Dough Nuts 6. Pencils 7. Spaghetti 8. Yoghurt 9. Syrup 10.Red Paint 10 = Ceiling Now create your own house list…. Always use something that you know already as your list…. 11 Tips to Improve Studying Results 1 Study in Short, Frequent Sessions – no more than one hour at a time, with 10min break. 2 Take Guilt-Free Days of Rest. 3 Honor Your Emotional State. Do not study if you are tired, angry, distracted, or in a hurry. 4 Review the Same Day. 5 Observe the Natural Learning Sequence. if you try first to grasp the big picture and then fill in the details, you often have a more likely chance of success. 6 Use Exaggeration. Why do runners sometimes strap lead weights to their legs? 7 Prepare Your Study Environment. For example, do you need special lighting, silence, music, privacy, available snacks, etc.? 8 Respect “Brain Fade.” As you place more information on top, the lower levels become older and less available to your immediate recall. The trick here is simply to review. 9 Create a Study Routine. An effective way to do this is to literally mark it down in your datebook calendar as if you have an appointment, like going to the doctor. For example: “Tuesday 34:30 P.M. — Study. 10 Set Reasonable Goals. Set your vision on the long-term dream, but your day-to-day activity should be focused exclusively on the short-term, enabling steps. 11 Avoid the Frustration Enemy. Don’t waste energy blocking, getting upset, and thinking that you’re not good enough — simply keep moving forward at a slower (but un-blocked) pace. The 7 Habits of Highly Effective People Habit 1: Be Proactive Habit 2: Begin with the End in Mind Habit 3: Put First Things First Habit 4: Think Win-Win Habit 5: Seek First to Understand, then to be Understood Habit 6: Synergize Habit 7: Sharpen the Saw Use a Diary – any plan is not a plan untill it’s written down. That includes a study plan.. The Time Management Quadrant 1 URGENT NOT URGENT •Preparation IMPORTANT •Crises •Pressing Problems •Deadline driven projects, meetings, preparations 2 •Prevention •Values clarification •Planning •Relationship building •Empowerment NOT IMPORTANT •Interruptions, phone calls 3 •Trivia, busywork •Some mail, some reports •Some telephone calls •Some meetings •“Escape” activities •Many popular activities •Excessive TV •Time wasters 4 Make it FUN!!